Adamo, Hawk Eye is all about the natural eye being better than normal. Cyberware, bioware, and electronic enhancements interfere with the way the eye naturally sees. Yes, it improves it in some ways, but it still interferes with the natural process. Even an overlay is still putting a filter between the eye and the light, changing the way it enters. Optical enhancements still work, because they don't change the light, simply focusing it. Magic works differently from that, enhancing the body or mind directly, so it still works. Drugs work on body chemistry, and some help the brain process images better, so those still work.